<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div>haode</div>
    <script>
        let div = document.querySelector('div')
        console.log(div);
        let stt = 'haodehaodehoae'
        //innerHTML 可以解析表签x`x`
        div.innerHTML = `<b>${stt}</b>`
        // div.innerText = stt
    </script>
</body>

</html>